3 Answers
3

... therefore, the fact that the Jews would [celebrate Passover by] eating flame-roasted lamb would not raise any questions, not even for the wicked son; as it's perfectly appropriate to celebrate a national holiday and make a day of feasting and joy, a day on which they left the slavery of Egypt, gained their freedom, and became a great nation of distinction. But why this requirement to first apply blood to the altar [and the doorposts in Egypt counted as an altar because G-d's presence was felt there] before eating the meat? That makes people ask, "what's this worship of yours?" And you answer -- "this is a Passover sacrifice to G-d"; His presence and glory was revealed to us in Egypt -- that is a lofty spiritual matter that was unheard of in other nations.

Adraba! There is no source. It is a natural expression of the inner yearning of Am Yisrael to reestablish our broken relationship with the Ha'Kadosh Baruch Hu with the Avoda of Korbanot in Beit Hamikdash.

Thanking Seth J for his comment below I'd like to clarify my original answer a bit.

It should be clear that BBQs on Yom Ha'atzmaut are not and should not be performed Zecher L'Korban. If done is such a manner it may even create a problem with eating the meat in terms of the prohibition of Bamot.

With that said, the setting of a BBQ is very similar to the setting when bringing and feasting on a Korban Toda. Therefore we could look at this modern day minhag as a (spiritually) natural development. Getting us prepared. The original question was about a source. My answer was that I don't see a need for a source. Even if a source is found it is most likely not what started the minhag. The minhag is already a few decades strong. And ... if you like juicy sizzling meat, it is a great minhag!

I was going to give you an upvote until the last clause in your second sentence. There are many things that can be symbolized with a BBQ, ranging from the Zeroa' and the Chagigah on the Seder plate (serving as a ZECHER for the Korbanoth) to La"G Ba'Omer bonfires. But I am uncomfortable upvoting an answer that suggests (perhaps unintentionally) that it is alright to substitute a flame-roasted hamburger for 'Avodath Beith HaMikdash. Would you consider revising your answer?
–
Seth JMay 10 '11 at 20:56

@Seth J you're right about the flame-roasted hamburger, but what about flame-roasted spare ribs! ... I updated my answer, maybe it is a bit more clear now. Thanks
–
David PerlmanApr 24 '12 at 20:38